Aquarium



FIG. 1 is a top plan view of an aquarium showing my new design;

FIG. 2 is a front elevational thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevational thereof; and

FIG. 5 is a right side elevational view thereof, the left side being a mirror image of the right side shown. 

The ornamental design for an aquarium, as shown and described. 